Used in more bike shops worldwide than any other tool brand, Park Tool produces industrial quality tools to withstand the rigors of daily service and repair. The Park Tool HXS 1. 2 Professional Hex Wrench Set ensures long lasting use, maximum torque, and a precise fit for years to come. Constructed with Bondhus Protanium high torque steel, these hex wrenches won't round off prematurely like cheaper grades of steel. Park Tool even engineered them with a balldriver tip on the longer arm for securely locking into those hard to reach bolts, with a straight tip on the shorter arm for maximum torque.